ASTM E399 Dynamic and Fatigue Testing Systems

(Dynamic & Fatigue Testing Machine)

ASTM E399 Dynamic and Fatigue Testing Systems are widely used in fields such as nuclear power, aerospațial, oil and gas, marine engineering, rail transportation, materials research and development, and failure analysis. Their core function is to determine the K₁c value of metallic materials to support design, material selection, safety assessment, and process optimization.

Standarde: ISO 12135, ASTM E399, BS 7448, ASTM E1820

Our dynamic fatigue testing machine is a versatile solution for tests requiring high precision and speed in force and position control.

Gama de sarcină dinamică de până la 2000 kN
Fără întreținere și ușor de instalat
Consum redus de energie
Testare extrem de fiabilă

Nuclear Power Engineering (ASTM E399 Dynamic and Fatigue Testing Systems)

Fracture Toughness Verification of Reactor Containment and In-Core Components
Verification of High-Strength Steel Containment Material for Pressurized Water Reactors
Material: 720 N/mm² grade low-alloy high-strength steel (ASTM A543 Class B Grade 1), used for steel containment vessels in nuclear power plants.
Method: C.(T) specimens were prepared according to ASTM E399, and after heat treatment and post-weld heat treatment, the K₁c of the base metal and weld line was tested. Verification included Pₘₐₓ/P_Q ≤ 1.10 and dimensions satisfying 2.5 (K₁c/σₛ)².
Results: K₁c ≥ 60 MPa・m¹/², no stress relief cracks, meeting nuclear safety standards, supporting the containment structure design.

Aerospace: Material Selection and Certification for Critical Load-Bearing Structures of Aircraft (ASTM E399 Dynamic and Fatigue Testing Systems)

Determination of K₁c for Ultra-High-Strength Steel Used in Fighter Aircraft Landing Gear (Aerospace Industry Case Study)
Materials: 300M steel, AerMet 100, and other ultra-high-strength steels, used for landing gear struts and connecting lugs.
Method: Pre-fatigue crack in SE(B) exemplare (a=0.5W), loading rate 1.0 MPa・m¹/²/s, record P-V curve to determine K_Q, verify thickness B≥12.7 mm and Pₘₐₓ/P_Q≤1.10.
Results: K₁c≥75 MPa・m¹/², ensuring no brittle fracture of the landing gear under impact load, and passing FAA airworthiness certification.
Low-Temperature Fracture Toughness Testing of Aluminum Alloy for Spacecraft Fuel Tanks (NASA Case Study)
Materials: 2219-T87 aluminum alloy, used for liquid hydrogen/liquid oxygen fuel tanks.
Method: Measure K₁c at -196℃ using C(T) exemplare, controlling the fatigue pre-crack length to ≥1.3 mm, a/W=0.5±0.05.
Value: K₁c≥35 MPa・m¹/², supporting crack propagation resistance design of the fuel tank structure, avoiding low-temperature brittle fracture.

Oil, Gas, and Energy: Fracture Safety Assessment of Pipelines, Pressure Vessels, and Deep-Sea Equipment (ASTM E399 Dynamic and Fatigue Testing Systems)

Fracture Toughness Classification of X80/X100 Steel for High-Pressure Natural Gas Pipelines (API Standard Compliant)
Materials: X80/X100 pipeline steel, used for girth weld and base metal assessment of long-distance pipelines.
Method: SE(B) exemplare, K₁c measured according to ASTM E399, combined with BS 7910 for weld defect tolerance assessment.
Results: X100 steel K₁c ≥ 100 MPa・m¹/², supporting the setting of the maximum allowable defect size for girth welds, reducing transportation risks.
K₁c Verification of Titanium Alloy Forgings for Deep-Sea Platforms (Marine Engineering Case Study)
Materials: Ti-6Al-4V ELI, used for platform risers and flanges.

Materials Research and Process Optimization (ASTM E399 Dynamic and Fatigue Testing Systems):

The Impact of Heat Treatment and Additive Manufacturing Processes on K₁c
Study on the Correlation between Martensite Content and K₁c in Dual-Phase Steel (DP Steel) (Materials Laboratory Case Study)
Variables: Martensite volume fraction 30%–40%, comparing different heat treatment processes.
Method: K₁c was measured using C(T) specimens according to ASTM E399, and fatigue crack growth rate was simultaneously measured using ASTM E647.
Concluzie: K₁c reached its peak (≥85 MPa・m¹/²) at a martensite content of 38%, providing a basis for process optimization of DP steel for automotive lightweighting.
Improvement of Fracture Toughness in Additively Manufactured Titanium Alloy (SLM Ti-6Al-4V) (Aerospace Materials Case Study)

Standards and Methods Development: New Specimen Configurations and Validity Extension

Disk Compact Tension (DC(T)) Specimen Validation (ASTM E399) (NASA Case Study)
Requirement: To provide a standard specimen for tubular/disk forgings.
Method: Compare K₁c values ​​of DC(T) and rectangular C(T) specimens to verify the consistency of the shape factor f(a/W) for a/W = 0.25–0.85.
Results: Data deviation ≤3%, included in ASTM E399 appendix, expanding the standard specimen library.
K₁c Testing of Special Materials (Beryllium Alloys) (Defense Industry Case Study)
Material: Beryllium-aluminum alloy, used in avionics packaging and weapon components.
Method: Prepare A(T) arc-shaped specimens according to ASTM E399 Appendix A9, controlling the fatigue pre-crack growth rate to ≤10⁻⁶ m/cycle.
Value: Obtained K₁c = 12–15 MPa・m¹/², supporting the safety factor design for brittle materials.